Question

Fill in the blank with a suitable adverb clause:
She is as witty .

• A. because she is pretty
• B. as she is pretty
• C. than she is pretty
• D. None of the above

Answer 1

The correct option is B as she is pretty

An adverb clause is a group of words containing a subject and a verb, and it functions as an adverb, by modifying an adjective, verb or an adverb. Adverb clauses generally begin with a subordinate conjunction (since, because, while, etc.)
Option B is correct because it is an adverb clause of comparison; "as...as" is a pair of conjunctions that refers to two things of the same level.
Option A is incorrect because it is an adverb clause of cause and not comparison.
Option C is incorrect because the correct pair of conjunctions is 'as...as' and not 'as...than'.
Option D is incorrect because the answer lies in B.